A couple years ago, I had a nail in my new snow tire, at the similiar spot as yours, right at the edge of the tread. Went to a chain tire shop, they wouldn't fix it, try to sell me a new tire.
So, look into the phone book, called a few independent tire places. One tire shop who had been in business for 25 years +, said it is no problem. They put a patch inside the tire. The total was $15.00, didn't need to re-balance, they just put it back at the same spot as before. The guy who fixed the tire said they can also patch sidewalls too if the damage is not too severe.
All 4 snows still have over 80% tread left, worked very well the last 2 winters.
(Message edited by initial_d on July 31, 2005)